Skimmer-scoop excavating machine



Feb. 26 1924. 1,485,199

' M. E. PUGH SKIMMER SCOOP EXCAVATING MACHIN Feb. 26 ,f 1924;

M. E. PUGH SKIMM ER SCOOP EXCAVATING MACHINE Filed Feb. 1o 1923 s sheets-sheet 2 izan/VENT?.

M. E. PUGH sKIMMERscooP ExcAvATING MACHINE Feb. 26 1924.

Filed Feb. l0 1923 3 Sheets-Sheet 3 Inl/Winn @if .lliElII-H. Nw gwn! QQ Patented Feb. 26, 1924.

,NORTON E. PUGH, OF CHICAGO, ILLINOIS.

SKIMMER-SCOOP EXCAVATNG MACHINE.

Application led February 10, 1923. Serial No. 618,238.

To all 'whom 271 may concern.'

Be it known that lf, MoRToN E. PUGH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Skimmer-Scoop Excavating Machines, of which the following is a specification.

The invention relates to skimmer-scoop Xcavators, in which the bucket or scoop travels along the boom which is raised and lowered during the operation of the machine, to cause the scoop to be filled and dumped.

The invention has among its various ob jects the provision of a means for actuating the scoop along the boom and the provision of a means for permitting the scoop to be dumped and automatically righted during its travel or descent along the boom prior to the lowering of the boom.

t is a further object of the invention to provide a carriage for the scoop, the scoop being pivotally connected to the carriage at one side and above the center of gravity of the scoop.

It is a further object of the invention to provide an improved locking means for the door or closure of the scoop.

In addition to the above, it is a further object to provide a means whereby the. latch or holding means for the door of the scoop may be operated to open the closure or close it from either the platform to which the boom is secured, or from any other convenient position of the operator.

The invention will be explained in conjunctionwith the accompanying drawings,

in which various arrangements of which the invention is susceptible are illustrated, it being obvious that changes and modifications may be resorted to without depart-V ing from the spirit of the appended claims forming a part hereof.

In the drawings,-

Fig. 1 is a side elevation of a skimmerscoop excavator showing the boom in its raised and lowered positions with the scoop in a dumping and operating position', this structure being provided with a means for automatically causing the dumping and righting of the scoop.

Fig.k 2 is an elevation similar to that illustrated in Fig. 1, showing a modified arrangement of the scoop, the righting device being eliminated.

Fig. 3 is a fragmentary view of a portion of the construction shown in Fig. 2, showing the scoop in a dumping position.

Figs. 4 and 5 are respectively end and side elevations of the mechanism employed for righting the scoop.

Fig. 6 is a plan view of the scoop shown in Figs. 1 and 2.

Fig. 7 is an end view of the scoop shown in Fig. 6. l

Fig. 8 is a side elevation Vof the scoop.

Fig. 9 is an end elevation of the forward end of t-he scoop.

Figs. 10 and 11 are respectively end and side elevations of the scoop carriage.

' Figs. 12 and 13 are views similar to Figs. fi and 5 of the righting mechanism.

Figs. 14 and 15 are respectively edge and side views of a lever employed in the scoop structure, and

Figs. 16 and 17 are respectively end and plan views of a brake Vand drum mecha# nism employed in the structure.

Referring particularly to Fig. 1, a platform 10 is employed upon which the motor 11 and other driving elements are mounted, the platform being supported by the truck 12 which may be of any suitable or desired structure. A boom 13 is pivotally connected to the platform 10 at 14.

This boom is formed of apair of channel beams 15 and 16 braced so as to provide the required strength, the braces including the frame work 17. The channel beams 15 and 16 are arranged so that the channel portions face outwardly to provide a track for the pairs of rollers 18 and 19, to which the scoop carriage generally designated 2O is secured. The scoop 21 is pivotally connected at 22 between the side frames 23 and 24 of the carriage. rThe pivotal connection 22 is arranged so that it will be positioned at one side and above the center of gravity of the scoop, which will insure the discharge of the scoop when released to permit of this and to assist in righting the scoop. The frame work 17 which is'part of the boom 13 is provided with a sheave 25 over which a cable 26 rides. One end of this cable 26 is connected at 27 to some suitable portion of the boom and is extended over a sheave 28 and around the sheave 25 to another sheave 29, and then leads to one side of a tandeindrum generally designated 30, the latter of which is of the usual construction, forms no part of my invention, and will therefore not be described. in detail, it being obvious that when the tandem drum 30 is rot-ated, it will either cause the boom 13 to be raised or lowered.

The boom 13 is further provided with a sheave 31 which is arranged adjacent the outermost end ot' said boom, and is provided Vto co-operate with. a cable which has one end, such as thereof, secured to a suitable portion ot the scoop carriage. The cable extends from its point oi attachment 33 over the sheave 3l under the sheave and has its oppositeI end secured to another portion of the tandem drum generally designated 30. Each drum ot the tandem is independently operable ot. the other, as is customary in devices of this character. so that the scoop may be caused to travel towards the outermost end of the boom7 and said boom raised and lowered independently o't the movement of the scoop.

As betore stated. the scoop is provided with an automaticallyY operated righting device, which is operable. to permit the scoop to assume a dumping` position atter the boom has been raised. rThis means includes the structure illustrated in Figs. 4, 5. l2 and 13, and includes the cables 35 and 36, which are respectively secured to the boom i3 at 37 and 33, the opposite ends oit' these cables being wound in opposite directions around a drum 39 with su'liicient wrappingjs to permit the scoop to travel from one end or the boom to the other. The drum is provided with a pinion 40. which meshes with a gear 4l which as clearly indicated in Fig. 4j is of a relatively larger dimension than the pinion. rThe gear 41 has a drum arranged upon its shaft, around which are wound the chains or cables 43, it being,T understood that one end oit each ot these chains is secured to the drum 42 and has its opposite end connected as shown at 44 to the upermost portion ot the scoop.

This righting device is constructed so that when the scoop descends along" the boom, which at this time is in a raised position, the scoop will be automatically caused to assume a position in which it is substantially parallel to the boom. It is manifest that as t ie scoop is drawn towards the outermost end ot the boom through the medium of the cable the cable 36 will cause the rotation of the drum 39 in one direction or in a counter-clockwise. direction as viewed from Fig. 4. This motion will be transmitted to the gear 4l through the medium or the pinion 40 to the gear 4l and the drum 42. which will cause the chains 43 to be wound upon said drum 42, causing` the scoop to assume a position substantially parallel to the boom, or, in other words, in a skimming or scoopingy position. i

The righting' device illustrated in Figs. 4, 5, l2 and 13, is mounted upon a shelf or' platform 44 which extends between the sides 23 and 24 of tho scoop carriage 20. llhis carriage is further provided with the abutmcnts 45 against which the scoop 2l may abut to limit its movement in one direction and to hold the scoop in its proper position during the scooping or excavating operation.

The mouth oil the scoop 2]. is provided with a mouthpiece 46, which extends from the sides across the bottom or the scoop. The opposite end of the scoop is provided with a closure 4T which is hinged to the shaft 48 through the medium ot hinged elements 49, the shaft 48 beiugrr secured to the top ot the scoop through the medium ot the brackets 50. lever 5l is pivotally secured to the shaft 48 so that it may move with respect thereto. rlhis lever is provided with an arm 52 and another arm 53. One strand of a 95 cable 54 is attached through the medium of a suitable clevis to the arm 52 of the lever 51. The opposite end such as 53, ot' this lever, rests against the closure 4? ot the scoop. This closure 4T is )rov'ded with a bolt or lat-ch which is secured to the closure through the medium of the clips 56. rl`his bolt 55 hasI another strand such as 57 of the cable 54secured to it thc strand being' provided to cause the release ot' the 95 latch and the opening ot' the closure upon the operation of the latch, TheI bolt 55 cooperates with a latch element 58. which is secured to saine stationair)V portion oit the scoop. The cable 54 extends around a drum which also has one end ot a cable wrapped around it, from which it extends over a movable sheave 6l, it beingextended downwardly towards the platform and connected at 62 to said platform. rlie sheave (il is held by means of the cable G3 and the sheaves 64 and 65 towards the uppermost portion ot the 'traine work mounted on the platform l()e it being of course understood that one end of the cable 63 is secured to the sheave 61 and has its opposite. end provided' with a weight 66. This arrangement 'i will permit the sheave G1 to travel between the sheave (34 and the floor ot the platform 10, and thus cause the weight (36 to be raised and lowered. The purpose and objectof this structure will presentl7 be apparent. rihe cable drum 59 is provided with a fric tion drum 627, with which the brakeeband G8 co-operates.y the latter ot which is connected to the foot lever 69 having the releasable holdingdog 7() secured thereto which co-operates with the pin 7l to hold the lever in its lowermost or braking po sition.

A short cable 72, one end of which is con nected to the lever 69 and has its opposite end secured to the portion 7 3 of the drum 59 is provided to rotate the drum 59 and cause the release of the bolt 55 of thek latch carried by the scoop, and may also be operated to right the scoop after it has assumed a dumping position.

The structure just above described is further employed to control the movement of the scoop relatively to the boom and thereby prevent its assuming a dumping position until permitted to do so by the operator. From the foregoing description it is evident that as the scoop travels towards the outermost end of the boom, it will gradually assume a dumping position or the position shown in full lines in Fig. l. During this travel, the line 54 will be held more or less taut, which will control the movement of the scoop to a dumping position. Upon the release of the rope 54, the scoop will assume the postion illustrated in full lines in Fig. l, and when a pulling strain is exerted upon this cable 54, the bolt of the latch will, through the medium of the strand 57, be actuated to cause the release of the latch, which will permit the closure 47 to open and discharge the contents of the scoop. Then the parts of the scoop have assumed this last named relation, the rope 54 may again be pulled upon to actuate the lever 51, which will cause the door to be slammed against the scoop to jar loose any material from the interior of the scoop which may tend to adhere thereto. It is manifest that as the scoop travels downwardly or descends the boom 13, the righting mechanism illustrated in Figs. 4 and 5 will cause it to assume a substantially parallel relation with respect to the boom. When the scoop assumes this substantially parallel relation relatively to the boom, the closure 47 is caused to automatically assume a closed position. The subsequent lowering of the boom causes the scoop to be positioned so that when it is drawn towards the outermost end of the boom by means of the cable 32, it will engage the surface to be excavated and scoop the material therefrom, after which a repetition of the previously described operation will cause an actuation of the mechanism in a manner similar to that referred to.

It will be noted that the closure such as 47 will automatically assume a closed position when the scoop is moved to assume a position substantially parallel with the boom, this being due to the construction of the scoop and the position of the pivot or shaft 48 of the door or closure, it being apparent by reference to Fig. 8, that the rear ends of the side walls of the scoop are arranged at an angle to the top and bottom walls of the scoop.

In the modified arrangement illustrated in Figs. 2 and 3, the automatic righting device such as illustrated in Figs. 4 and 5 is dispensed with. The scoop and carriage is moved towards the outermost end of the boom 13a by means of the cable 32a in a manner similar to that described in connec- Vtion with the structure shown in Fig. l.

carriage of the scoop and travels over a sheave 31a and under a sheave 34a, the opposite end of the cable being connected to one of the tandem drums 30EL mounted on the platform of the machine. As the scoop and carriage are moved outwardly upon the boom by means of the cable 32a, the rope 542? is held moreor less taut by the drum 59, and the brake mechanism 68a, the latter of which may be of any ordinary or usual structure, whereby the drum 59r1 may be releasably held against movement.

During the travel of the scoop towards the outermost end of the boom, the cable 54a is held taut and fed off from the drum 59a so that the scoop will be held against assuming a dumping position until the brake mechanism is released to permit it to discharge the material contained in the scoop. The cable 54a is connected to a lever 51a which is similar in structure and function to the lever 51 shown and described in con nection with the structure of the scoop illustrated in Figs. 1, 6, 7 and 8. The closure 47 a of the scoop is provided with a bolt 552L which is connected to the cable 54 through the chain strand 57 a which will cause av pull to be exerted upon the bolt when the scoop assumes a dumping positionso as toorelease the closure for the scoop. This arrangement also permits the closure to be slammed against the end of the scoop to ar loose any material which may tend to adhere to the interior thereof..

A brake mechanism which -co-operates with the drum 59a illustrated in Fig. 2, includes the foot lever 68a which is secured to thev shaft 90a and has a lever 89aA extending therefrom. This lever 89a` is connected at 88a thru the medium of a link 91a to one end of a lever which is pivoted at 87 a. The opposite end of the lever has oneend of a brake band a secured to itas designated at 86a. The opposite end of the brake band is secured to some Vstationary portion of the structure and it is manifest-that as pressure is applied to or released from the lever 68a the brake band 85a will be caused to cooperate and release the brake drum 59a and provides an arrangement for controlling the rope or cable 54a and will thus hold the scoop against assuming a dumping position and is operable to release the closure and permit it to be Aslammed against the end of the scoop to jar any material` which may adhere to the interior of the scoop therefrom.

From the foregoing description, and particularlj7 that relating to the structure illus trated in Fig. l, it will be evident that a means is provided whereby the scoop is automatically righted from a dumping position to a digging position, as it descends the boom, in which position it will be retained during the digging operation, and released to permit it to dump the contents ot the scoop when it reaches the desired position relative to the outermost end orn the boom.

It is also manifest that the pivotal connection between the carriage and the scoop is arranged at one side and above the cc-ntcr of gravity of the scoop, which will insure its dumping and also assist in more readily righting the scoop after it has performed the dumping operation.

It is further manifest that the cable or pull line 54 or 54a in the structure illustrated in Figs. 2 and 3 performs the function of righting the scoop, unlatching the lock and the closing of the door.

It is further apparent that another object and advantage attained by the invention, is the provision of a scoop operating mechanism adapted for and operable on the dit ferent types of excavating machines, such as are in use at the present day, to the end that such mechanism can be operated on all such machines without any alteration in the machine whatever, It is a well known fact that about half of the excavating machines in present use are provided with two power driven drums only, and about the other half of the excavating machines in use at-,the present time are provided with three power driven drums.

In the case ofthe machines which have only two power driven drums it is manifest that an auxiliar)7 righting deviceI must be provided for righting, dumping, and adjusting the scoop. However, if the kmachine is of the three power driven drum type, including brakes, as shown in Fig. 2, the above mentiorpd auxiliary righting device is dispensed wit Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In a machine of the character described having a boom, a scoop, operable along said boom, mea-ns Jfor dumping the scoop, and means for automatically righting said scoop from its dumping position as it travels along said boom.

2. In a machine of the character described having a boom, a scoop operable along said boom, means for dumping the scoop, and means for automatically righting said scoop from its dumping position as it travels along said boom to a digging position.

3. Ina machine of the character described nasales' having a boom, a scoop operable along said boom, means for dumping the scoop, and means for automatically righting said scoop from its dumping position as it travels along said boom, said means being operable to permit said scoop to assume a dumping position.

4. In a machine of the character described having a boom, a carriage arranged for movement lengthwise oi said boom, a scoop pivotally connected to said carriage. means permitting` the scoop to be dumped and means for automatically righting said scoop from said dumping position, said means being mounted upon said carriage.

5. In a machine of the character' described having a boom, a scoop operable along said boom, means for dumping the scoop and means for automatically righting said scoop from its dumping position as it travels along said boom, said means including a cable one end of which is secured adjacent an end of said boom.

6. In a machine of the character described having a boom, a scoop operable along said boom and means for automatically righting said scoop as it travels along said boom, said means including cables the ends of which are secured adjacent the opposite ends ot said boom.

7. In a machine of the character described having a boom, a scoop operable along said boom, means for dumping the scoop and means for automatically righting said scoop as it travels along said boom, said means including a drum and a connection between said drum and the'scoop.

8. In a. machine of the character described having a boom, a scoop operable along said boom, means for dumping the scoop and means for automatically righting said scoop from its dumping position during its travel along said boom, said means including a rotatable element cooperatively connected to said scoop.

9. In a machine of the character described l having a boom, a scoop operable along saiils boom, means for dumping the scoop and means for automatically righting said scoop from its dumping position during its travel along said boom, said means including a drum, a cable arranged to actuate said drum and a connection between said drum and said scoop.

l0. In a machine of the character described having a boom, a scoop operable along said boom and means for automatically righting said scoop as it travels along said boom, said means including a drum, p cables, the ends of which are secured to said boom, and are cooperatively connected to said drum, and a connection between said drum and said scoop.

l1. In a machine of the character described having a boom, a scoop carried by X30 said boom and being operable along said boom, said scoop having a closure, a latch for the closure, a pull line connected to said closure, said pull line being operable to assist in righting said scoop', operate the latch, to release said closure, and to close said closure.

12. Ina machine of the character described having a boom, a scoop operable along said boom and means for automatically righting said scoop as it travels along said boom, said means including a drum, cables the ends or" which are secured to said boom and are cooperatively connected to said drum, a rotatable -member operable upon the actuationiof said drum, and a flexible element connected to said last nientioned rotatable member and said scoop.

13. In a machine of the character described having a boom, a scoop operable along said boom, and means for automatically righting said scoop as it travels along said boom, said means being operable to permit said scoop to assume a dumping position, including a drum, cables the ends of which are secured to said boom and are cooperatively connected to said drum, a rotatable member operable upon the actuation of said drum, and a lexible element connected to said last mentioned rotatable member and said scoop.

14. In a machine of the character described having a boom, a scoop operable along said boom, means for dumping the scoop and means for righting said scoop and pulling .it back into digging position, said means including a power driven drum operable along the boom with the scoop and a flexible connection between said drum and said scoop.

15. In a machine of the character described having a boom, a scoop, the Scoop being operable With said boom, means for tensioning the outward travel of said scoop and preventing premature discharge of its contents, said means including a holding brake mechanism cooperating with a drum, and flexible connections bet-Ween said drum, and said scoop, said connections being controlled by said brake mechanism.

16. 1n a scoop operating mechanism of the character described having a movable boom, a scoop operable along side of said boom, a closure for said scoop, means for unlatching the closure of said scoop said means being provided on said closure and permitting it to swing to vertical position 'for discharge of its contents, said means including a brake, a drum, and a flexible connection having three ends, one end attached to said drum, one end connected to the unlatching device located on the closure, the third end being connected to a pulling and closing member located on the upper rear end of said scoop.

MORTON E. PUGH. 

